Improvement in metallurgic furnaces



G. PERRY ai.. WEBB.

Metallurgia Furnaces.

Pat'e'ned May 6,1873.

UNITED STATES PATENT CEFIoE.

GEORGE PERRY AND JOB WEBB, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN METALLURGIC FURNACES.

' Specification forming part of Letters Patent No. 138,523, dated May 6,1873; application filed March 11, 1873.

To alt whom it may concern:

Be it known that we, GEORGE PERRY and JOB WEBB, both of Chicago, Cook county, Illinois, have invented an Improvement in Furnaces, of which the following is a specification:

'The object of our invention is to thoroughly consume the smoke in a heating or puddling furnace, in its passage from the iire-placeto the body of the furnace and before reaching the latter; and we accomplish this object by constructing the furnace in the manner which we will now proceed to describe, reference being had to the accompanying drawing, in which- Figure 1 is a longitudinal vertical section, and Fig. 2 a sectional plan View, on the line l 2, Fig. l.

The furnace illustrated in the drawing is adapted especially for heating heavy iron or steel ingots for railroad rails. I t has one body, A, with charging-holes a on both sides, and two fire places, B B', separated by a partition, b, and communicating through separate tlues with the body A. It is'the arrangement of these fines and of certain bridgewalls and blast-pipes thatconstitutes our invention. At the back of each tire-place is a bridge-wall, d, opposite which, at the front end of the body ofthe furnace is a corresponding bridgewall, c, a considerable space intervening between these bridge-walls, and being continued downward in an inclined direction and beneath the fire-places, between walls d and e', as shown in Fig. l. Within the inclined portion of this space is an arch, f, and in the vertical portion of the same is a bridge-wall, g, connected to the said arch and extending quite to the roof h of the furnace. A continuous iue, K, for the passage of the products of combustion is thus formed between the bridge-walls d and g, between the wall d1 and the upper side of the arch f, between the under side of the said arch and the wall c', and between the bridgewalls g and e. A cold-air ue or pipe, z', communicates with the eXtreme lower portion of the flue k, and the intermediate bridge-wall gis made of sufficient thickness to receive a perforated blast-pipe, on, adjacent to its point of connection with the arch, and for the formation within its upper portion adjacent to the roof of the furnace, of a passage and series' of ,perforations, p, communicating with a cold-air flue, s.

A draft being created by means of the blast, the flame, smoke, and other products of combustion, from each fire-place, pass over the bridge-walls d, and then take the course indicated by the arrows through the return-flue K, traversing the entire length of the latter, and finally passing over the bridge-wall d and into the body of the furnace in a highly heat; ed state and entirely free from smoke, the latter combining with the cold air, which is admitted through the pipes c and m and apertures p, and being thus entirely consumed, thus intensifying the heat of the furnace and improving the quality of the metal treated in the same, as the latter is not submitted as usual to the action of partially consumed products of combustion.

Our invention is applicable to puddlin g and other furnaces, as well as to those intended for heating, and it is not absolutely necessary in carrying out our invention that two replaces and sets of fines should be used in connection with a single body, A, as one fireplace will in many cases be found sufficient.

We claim as our invention- 1. The combination, substantially as dcscribed, of a return-flue, K, and blast-pipes communicating therewith, with the body A and Ere-place B of a furnace.

2. The combination of the bridge g and arch f with the bridgewalls el and c, and walls d and el, the whole being arranged, substantially as described, so as to form a continuous return-flue., K, communicating with the replace and body of the furnace.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

GEORGE PERRY. JOB WEBB.

Witnesses:

E. D. SWAN, INI. C. SLATN. 

